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Description: 基于DFT的瞬时测频算法，及插值算法，最后由图形表示测频结果。-Based on the Instantaneous Frequency Measurement DFT algorithm, and the interpolation algorithm, and finally by the graphical representation of frequency measurement results.
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Size: 1024 |
Author: 赵琦 |
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Description: 定义了signal的类和它的方法，主要有FFT DFT和卷积运算，并能处理简单的复数。-The definition of the signal class and its methods, the main FFT DFT and convolution operation, and can handle a simple plural.
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Size: 331776 |
Author: 芦达 |
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Description: DFT(Discrete Fourier Transformation)是数字信号分析与处理如图形、语音及图像等领域的重要变换工具，直接计算DFT的计算量与变换区间长度N的平方成正比。当N较大时，因计算量太大，直接用DFT算法进行谱分析和信号的实时处理是不切实际的。快速傅立叶变换(Fast Fourier Transformation，简称FFT)使DFT运算效率提高1～2个数量级。其原因是当N较大时，对DFT进行了基4和基2分解运算。FFT算法除了必需的数据存储器ram和旋转因子rom外，仍需较复杂的运算和控制电路单元，即使现在,实现长点数的FFT仍然是很困难。本文提出的FFT实现算法是基于FPGA之上的，算法完成对一个序列的FFT计算，完全由脉冲触发，外部只输入一脉冲头和输入数据，便可以得到该脉冲头作为起始标志的N点FFT输出结果。由于使用了双ram，该算法是流型(Pipelined)的，可以连续计算N点复数输入FFT，即输入可以是分段N点连续复数数据流。采用DIF(Decimation In Frequency)-FFT和DIT(Decimation In Time)-FFT对于算法本身来说是无关紧要的，因为两种情况下只是存储器的读写地址有所变动而已，不影响算法的结构和流程，也不会对算法复杂度有何影响。-err
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Size: 59392 |
Author: 吴庆庆 |
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Description: Discrete Fourier Transform and Power Spectrum
Calculates Power Spectrum from a Time Series
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Size: 1024 |
Author: hotfire |
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Description: 利用经典的Cooley-Tukey基2算法求复序列x（n）的DFT X（k）-Use of the classic Cooley-Tukey radix-2 algorithm for complex sequence x (n) of the DFT X (k)
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Size: 1024 |
Author: enhom |
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Description: 离散傅立叶算法(DFT)、快速傅立叶算法(FFT)通用源码-Algorithm for Discrete Fourier (DFT), fast Fourier algorithm (FFT) common-source
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Size: 5120 |
Author: Daniel |
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Description: 一些常见的《数字信号处理》和《信号与系统》的函数和常用公式，例如FFT，DFT变换公式等。-Some common
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Size: 13765632 |
Author: 钱能 |
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Description: 本程序实现了数字图像的DFT变换嵌入算法-This procedure achieved a digital image of the DFT transform algorithm
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Size: 2048 |
Author: zfree528 |
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Description: DFT：离散傅立叶变换
符运行后得频谱图-DFT: Discrete Fourier Transform running at a frequency spectrum
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Size: 7168 |
Author: chemmy |
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Description: 基4的FFT算法程序，它是要通过将长度为N的数据序列转化成大小为4的DFT来实现高速化。从理论上讲，它比执行时间缩短为基2的FFT的3/4。该程序性能优越，可用性很强。下载即可用！-4 FFT algorithm based procedures, it is to be adopted will be a length of N data sequence into a size of 4 to achieve high-speed DFT. In theory, shorter than the execution time of FFT-based 2 of 3/4. The superior performance, availability, very strong. Can be used to download!
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Size: 1024 |
Author: jojocheng |
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Description: 序列的dft实现代码对序列快速分析,代码很人性化的-DFT sequence realize rapid analysis of sequence code, the code is very humane
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Size: 1024 |
Author: qiuyingxin |
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Description: 采用离散傅立叶变换（DFT）实现对采样得到的波形数据文件进行频谱分析的一般方法-Using Discrete Fourier Transform (DFT) has been the realization of the sampling waveform data file to the general method of spectral analysis
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Size: 8192 |
Author: 陈 |
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Description: 基于DCT,DFT,DWT等的水印算法，还有加置乱的水印算法，用于图像处理方面-Based on the DCT, DFT, DWT, such as the watermarking algorithm, as well as increase the watermark scrambling algorithm, for image processing
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Size: 16384 |
Author: 孔萍萍 |
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Description: 分四种情况实现fft
分别是时间抽取递归 、时间抽取循环、频率抽取递归和频率抽取循环
以及附带dft的算法描述-Fft realize sub-four cases were collected recursive time, time taken from the cycle, frequency and frequency of samples taken from recursive cycle, as well as incidental DFT algorithm described
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Size: 1024 |
Author: didi |
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Description: DFT算法的Keil C51实现，在51系列单片机上调试通过-DFT algorithm realize Keil C51, in the 51 series single-chip debugging through
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Size: 1024 |
Author: key |
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Description: 好用的影像处理系统，可以做fft、dft等高通滤波器。
欢迎大家试用-Useful image processing system, can do fft, dft high pass filter. Welcomed the U.S. trial
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Size: 2262016 |
Author: spencer |
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Description: 使用傅里叶变换实现希尔伯特变换C程序，包括傅里叶变换在内dft-The use of Fourier transform to achieve Hilbert C procedures, including Fourier transform, including DFT
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Size: 1024 |
Author: 张辉 |
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Description: 这本书从零开始，详细从数学方面讲解和推导了FFT，DFT，卷积，相关等信号处理原理，有兴趣的朋友-This book from scratch, from mathematics to explain in detail and derived FFT, DFT, convolution, correlation and other signal processing theory, are interested in friends
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Size: 8683520 |
Author: xurongjun |
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Description: 一种用c语言编的傅立叶变换，其中里面有快速傅立叶变换-A series of c language Fourier transform, of which there are fast Fourier transform
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Size: 2048 |
Author: 标 |
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Description: 数字信号处理基于matlab 文件内容
/conv(卷积部分)
dupconv 重叠保留法
freqcirconv 频域圆周卷积
freqconv 频域卷积
timecirconv 时域圆周卷积
timeconv 时域卷积
/fft(频域分析部分)
d2fft 基2FFT
dft DFT最简化程序
dtft DTFT演示
/fir(fir滤波器设计)
fir 得到fir滤波器hn
getwindow 得到fir滤波器窗函数wn
idealfilter 理想滤波器(低通,高通,带通)hdn
idealhd 理想低通滤波器
/fir gui(fir滤波器GUI设计)
gui_top 总图
gui_fir fir滤波器GUI
gui_sigout 选择信号GUI
/power caculate(功率谱分析)
directpower 直接谱分析
indirectpower 间接谱分析(估计谱分析)
noise 噪声谱分析
/sigout(常见信号产生)
sigout 离散信号产生-Digital signal processing matlab based on the content of the document/conv (convolution part) dupconv law of reservations freqcirconv overlapping frequency domain circular convolution freqconv frequency domain convolution timecirconv time-domain circular convolution timeconv time-domain convolution/fft (frequency domain analysis part) d2fft base 2FFT dft DFT the most simplified procedure dtft DTFT demo/fir (fir filter design) fir be fir filter hn getwindow be fir filter window function wn idealfilter ideal filter (low pass, high pass, band-pass) hdn idealhd ideal low-pass Filter/fir gui (fir filter GUI design) gui_top general layout gui_fir fir filter selection GUI gui_sigout signal GUI/power caculate (power spectrum analysis) directpower direct spectral analysis indirectpower indirect spectral analysis (spectral analysis estimated) noise noise spectrum analysis/sigout (common signals) sigout discrete signals
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Size: 36864 |
Author: 芦达 |
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